<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
          .box{
            width: 900px;
            height: 300px;
            display: grid;
            /* 设置列宽和行高 */
            grid-template-columns: 100px ;
            grid-template-rows: 100px ;
            grid-template-areas: 
                 "dav1 dav1 dav2" 
                 "dav1 dav1 dav4"
                 "dav3 dav5 dav4"
            ;
          }
          .div1{
            grid-area: dvu1;
            background: aqua;
          }
          .div2{
            grid-area: dvu2;
            background: black;
          }
          .div3{
            grid-area: dvu3;
            background: cadetblue;
          }
          .div4{
            grid-area: dvu4;
            background: darkblue;
          }
          .div5{
            grid-area: dvu5;
            background: firebrick;
          }

    </style>
</head>

<body>
    <div class="box">
        <div class="dav1">1</div>
        <div class="dav2">2</div>
        <div class="dav3">3</div>
        <div class="dav4">4</div>
        <div class="dav5">5</div>
    </div>
</body>

</html>